PSA of NATURAL EXTERNAL HAZARDS INCLUDING EARTHQUAKE Workshop Proceedings
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Nuclear Regulation NEA/CSNI/R(2014)9 July 2014 www.oecd-nea.org Probabilistic Safety Assessment (PSA) of Natural External Hazards Including Earthquakes Workshop Proceedings Prague, Czech Republic 17-20 June 2013 Unclassified NEA/CSNI/R(2014)9 Organisation de Coopération et de Développement Économiques Organisation for Economic Co-operation and Development 02-Jul-2014 ___________________________________________________________________________________________ English text only NUCLEAR ENERGY AGENCY COMMITTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS Unclassified NEA/CSNI/R(2014)9 PSA OF NATURAL EXTERNAL HAZARDS INCLUDING EARTHQUAKE Workshop proceedings Prague, Czech Republic June 17-20, 2013 This document only exists in PDF format JT03360085 English text only Complete document available on OLIS in its original format This document and any map included herein are without prejudice to the status of or sovereignty over any territory, to the delimitation of international frontiers and boundaries and to the name of any territory, city or area. NEA/CSNI/R(2014)9 ORGANISATION FOR ECONOMIC CO-OPERATION AND DEVELOPMENT The OECD is a unique forum where the governments of 34 democracies work together to address the economic, social and environmental challenges of globalisation. The OECD is also at the forefront of efforts to understand and to help governments respond to new developments and concerns, such as corporate governance, the information economy and the challenges of an ageing population. The Organisation provides a setting where governments can compare policy experiences, seek answers to common problems, identify good practice and work to co-ordinate domestic and international policies. The OECD member countries are: Australia, Austria, Belgium, Canada, Chile, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Israel, Italy, Japan, Luxembourg, Mexico, the Netherlands, New Zealand, Norway, Poland, Portugal, the Republic of Korea, the Slovak Republic, Slovenia, Spain, Sweden, Switzerland, Turkey, the United Kingdom and the United States. The European Commission takes part in the work of the OECD. OECD Publishing disseminates widely the results of the Organisation’s statistics gathering and research on economic, social and environmental issues, as well as the conventions, guidelines and standards agreed by its members. This work is published on the responsibility of the OECD Secretary-General. The opinions expressed and arguments employed herein do not necessarily reflect the official views of the Organisation or of the governments of its member countries. NUCLEAR ENERGY AGENCY The OECD Nuclear Energy Agency (NEA) was established on 1 February 1958. Current NEA membership consists of 31 countries: Australia, Austria, Belgium, Canada, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Luxembourg, Mexico, the Netherlands, Norway, Poland, Portugal, the Republic of Korea, the Russian Federation, the Slovak Republic, Slovenia, Spain, Sweden, Switzerland, Turkey, the United Kingdom and the United States. The European Commission also takes part in the work of the Agency. The mission of the NEA is: – to assist its member countries in maintaining and further developing, through international co-operation, the scientific, technological and legal bases required for a safe, environmentally friendly and economical use of nuclear energy for peaceful purposes, as well as – to provide authoritative assessments and to forge common understandings on key issues, as input to government decisions on nuclear energy policy and to broader OECD policy analyses in areas such as energy and sustainable development. Specific areas of competence of the NEA include the safety and regulation of nuclear activities, radioactive waste management, radiological protection, nuclear science, economic and technical analyses of the nuclear fuel cycle, nuclear law and liability, and public information. The NEA Data Bank provides nuclear data and computer program services for participating countries. In these and related tasks, the NEA works in close collaboration with the International Atomic Energy Agency in Vienna, with which it has a Co-operation Agreement, as well as with other international organisations in the nuclear field. This document and any map included herein are without prejudice to the status of or sovereignty over any territory, to the delimitation of international frontiers and boundaries and to the name of any territory, city or area. Corrigenda to OECD publications may be found online at: www.oecd.org/publishing/corrigenda. © OECD 2013 You can copy, download or print OECD content for your own use, and you can include excerpts from OECD publications, databases and multimedia products in your own documents, presentations, blogs, websites and teaching materials, provided that suitable acknowledgment of the OECD as source and copyright owner is given. All requests for public or commercial use and translation rights should be submitted to [email protected]. Requests for permission to photocopy portions of this material for public or commercial use shall be addressed directly to the Copyright Clearance Center (CCC) at [email protected] or the Centre français d'exploitation du droit de copie (CFC) [email protected]. 2 NEA/CSNI/R(2014)9 COMMITTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS Within the OECD framework, the NEA Committee on the Safety of Nuclear Installations (CSNI) is an international committee made of senior scientists and engineers, with broad responsibilities for safety technology and research programmes, as well as representatives from regulatory authorities. It was set up in 1973 to develop and co-ordinate the activities of the NEA concerning the technical aspects of the design, construction and operation of nuclear installations insofar as they affect the safety of such installations. The committee’s purpose is to foster international co-operation in nuclear safety amongst the NEA member countries. The CSNI’s main tasks are to exchange technical information and to promote collaboration between research, development, engineering and regulatory organisations; to review operating experience and the state of knowledge on selected topics of nuclear safety technology and safety assessment; to initiate and conduct programmes to overcome discrepancies, develop improvements and research consensus on technical issues; and to promote the co-ordination of work that serves to maintain competence in nuclear safety matters, including the establishment of joint undertakings. The clear priority of the committee is on the safety of nuclear installations and the design and construction of new reactors and installations. For advanced reactor designs the committee provides a forum for improving safety related knowledge and a vehicle for joint research. In implementing its programme, the CSNI establishes co-operate mechanisms with the NEA’s Committee on Nuclear Regulatory Activities (CNRA) which is responsible for the programme of the Agency concerning the regulation, licensing and inspection of nuclear installations with regard to safety. It also co- operates with the other NEA’s Standing Committees as well as with key international organisations (e.g., the IAEA) on matters of common interest. 3 NEA/CSNI/R(2014)9 4 NEA/CSNI/R(2014)9 OECD/NEA COMMITTEE ON THE SAFETY OF NUCLEAR INSTALLATIONS (CSNI) PSA OF NATURAL EXTERNAL HAZARDS INCLUDING EARTHQUAKE Workshop proceedings Prague, Czech Republic June 17-20, 2013 5 NEA/CSNI/R(2014)9 6 NEA/CSNI/R(2014)9 Table of Contents EXECUTIVE SUMMARY………………………………………………………………………………... 9 1. INTRODUCTION………………………………………………………………………………………. 12 1.1 Background………………………………………………………………………………………….. 12 1.2 Objectives of the Workshop………………………………………………………………………… 12 1.3 Organization of the Workshop………………………………………………………………………. 13 1.4 Topics of the Workshop……………………………………………………………………………... 13 2. RECENT WGRISK ACTIVITIES PRECEDING ORGANIZATION OF THE WORKSHOP………. 16 2.1 WGRISK workshop on seismic hazards PSA………………………………………………………. 16 2.2 WGRISK survey project on non-seismic external events…………………………………………... 17 2.3 WGRISK broad survey project on PSA use and development……………………………………... 18 2.4 WGRISK most recent activities related to the area of external events PSA……………………….. 19 3. SUMMARY OF THE WORKSHOP ON PSA OF NATURAL EXTERNAL HAZARDS…………... 22 3.1 Opening Session…………………………………………………………………………………….. 22 3.2 Session 1 – Analysis of natural external hazards potential…………………………………………. 24 3.3 Session 2 –Specific features of analysis and modeling of particular external hazards…………….. 26 3.4 Session 3 – Practices and research efforts on natural external events PSA………………………... 27 3.5 Session 4 – Modeling of NPP response to natural external events in PSA………………………… 28 3.6 Session 5 – Seismic risk analysis…………………………………………………………………… 29 3.7 Session 6 – Use of external events PSA with the focus on regulatory body role………………….. 31 3.8 Facilitated discussions……………………………………………………………………………… 33 4. CONCLUSIONS AND RECOMMENDATIONS MADE IN THE WORKSHOP…………………… 40 4.1 Status of EE-PSA including recent developments………………………………………………….. 40 4.2 Challenges in external analysis methods and organization…………………………………………. 42 4.3 General conclusions regarding future role of WGRISK……………………………………………. 43 5. REFERENCES………………………………………………………………………………………….. 45 APPENDICES 1. LIST OF PARTICIPANTS 2. WORKSHOP AGENDA 3. PAPERS/PRESENTATIONS 7 NEA/CSNI/R(2014)9 8 NEA/CSNI/R(2014)9 EXECUTIVE SUMMARY